Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H25/00—Switches with compound movement of handle or other operating part
  • H01H25/04—Operating part movable angularly in more than one plane, e.g. joystick
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
  • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
  • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
  • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
  • A47J43/0705—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the upper side

Definitions

• the present invention relates to a household appliance held by hand, intended to drive at least one working tool, comprising a housing containing an electric motor whose output shaft is intended to drive the working tool having an axis whose one end is inserted into an opening in the housing, a motor speed control switch which is actuated by a manual operating button mounted to rotate along an axis of rotation so as to come to occupy a "stop" position and one or several angular "on” positions, and a device for ejecting the working tool which can be controlled by the button in its "off" position.
• the rotary button for manual operation is adapted, in addition to controlling the switch for regulating the speed of the motor, to controlling the whip ejector device by means of a control mechanism, of the cam and lever type, and, for this purpose, is turned by the user beyond its "stop" position to control the operation of the whip ejection device.
• a control mechanism of the cam and lever type
• the object of the invention is in particular to remedy these drawbacks and to produce a household appliance held in the hand, of the type described above, in which the ejection of the working tool can be carried out easily and accurately in the stop position even of the manual operation button.
• the manual operating button is also pivotally mounted around an axis transverse to its axis of rotation so as to control the actuation of the ejector device of the working tool.
• the manual operating button comprises a lug directly actuating the ejector device of the working tool during the tilting of the button.
• This lug for direct actuation therefore constitutes a simple mechanical means, in contrast to the complex mechanism with cam and lever according to the prior art, thus leading to an inexpensive manufacture of the manual operating button.
• FIG. 1 is a partial view in vertical section of a household appliance held by hand, such as a mixer-mixer, according to the invention
• FIG. 2 is a top view of the apparatus of Figure 1;
• FIG. 3 is an enlarged perspective view of a manual operating button associated with a switch, this button being illustrated in a position for controlling the speed of the motor (in solid lines) and in a position ejection of a working tool (in dashed lines);
• FIG. 4 is a schematic exploded perspective view of the switch of Figure 3;
• FIG. 5 is an enlarged perspective view of the button associated with the switch, showing one finger actuation by a button cam when the latter occupies a position for controlling the speed of the motor; and Figures 6 and 7 are schematic views showing a conductive track and a movable contact respectively not requested by the finger of the switch of Figure 5 ( Figure 6) and requested by the same finger ( Figure 7).
• the hand-held household appliance 1 is an electric hand mixer-mixer intended to selectively drive at least one threshing tool, such as a whisk or a kneader. , or a mixing tool rotating at high speed, such as for example a mixer stand with a rotary propeller.
• threshing tool such as a whisk or a kneader.
• mixing tool rotating at high speed such as for example a mixer stand with a rotary propeller.
• the hand mixer 1 illustrated in FIG. 1 comprises a box 2 of generally prismatic shape having a recessed part 4 which delimits a handle 5, and containing an electric drive motor 7 provided with an output shaft 8 of axis XX 'and housed in the lower part 10 of the housing 2, extending horizontally therein.
• the shaft 8 of the drive motor 7 carries at its front end 12 an endless screw (not shown) which cooperates with two helical pinions each rotating around a vertical axis YY 'perpendicular to the axis XX', and which forms with them a reduction gear 14.
• These two helical pinions are located in the front part 16 of the housing and are connected respectively to two coupling devices 18 of axis YY ', only one of which is visible on the Figure 1, respectively intended to receive, by insertion through two openings 20 made in the base 22 of the housing 2, the two upper ends of the respective axes 24 of two threshing tools, in this case two whips 26, only one of which is shown in FIG. 1; these two whips 26 can be fixed in the coupling devices 18 either side by side or one behind the other.
• the rear end 28 of the shaft 8 of the drive motor 7 carries a rotary drive 30 intended to receive, by insertion through an opening 32 made in the rear wall 33 of the housing 2, a mixing tool (not shown), such as for example a mixer stand.
• a projecting manual operating button 37 which is rotatably mounted along an axis of rotation denoted ZZ ', currently transverse to the axis YY 'of the whips 26.
• This manual operating button 37 is intended to actuate an electric switch 40 which turns the motor 7 on and off and regulates its speed of rotation.
• the button 37 can occupy a "stop" position and one or more successive "on” positions, for example three in number, arranged at a certain angle from one another, on the same side of the "stop” position, so as to constitute a sector for controlling the speed of the motor 7 making it possible, in this example, to select three stages of motor speed.
• These different electrical switching positions of the switch 40 are indicated in the form of appropriate marks marked on the wall. upper 42 of the housing 2, in front of the switch actuation button 37.
• the mixer-mixer also has a whip ejector device 45 which is controlled by the manual operating button 37 from its "off" position.
• the ejector device 45 is constituted by a movable ejection part 47 arranged vertically in the front part 16 of the housing 2, between the button 37 and the two coupling devices 18.
• This ejection part 47 has a lower part 47a bearing on the upper ends of the axes 24 of the two whips 26, and is elastically urged by a return spring (not shown) to pass from a low position in the absence of the whips to a high position ( Figure 1) during assembly of the whips, and vice versa from this high position to the low position in which the ejection part 47 releases the whips under the action of the manual operating button 37 from its "off" position.
• the manual operating button 37 is also mounted tilting about an axis, denoted BB ′ in FIG. 3, transverse to its axis of rotation ZZ ′ so as to control 1 actuation of the ejection part 47 of the whips 26.
• the switch 40 which will be described in detail below, is of the rotary type and consists of two concentric external discs and joined against each other by all suitable coupling means, i.e. fixed disc forming a support 49 provided axially with a shaft 51 fixedly mounted in the housing and constituting the axis of rotation ZZ 'of the button 37 (FIGS. 1 and 3), and a rotary disc 53 forming a switching support made of insulating material and intended to be driven in rotation by the manual operating button 37 when the latter is rotated along its axis ZZ 'to come to occupy its "off" position or one of its "on” positions.
• suitable coupling means i.e. fixed disc forming a support 49 provided axially with a shaft 51 fixedly mounted in the housing and constituting the axis of rotation ZZ 'of the button 37 (FIGS. 1 and 3), and a rotary disc 53 forming a switching support made of insulating material and intended to be driven in rotation by the manual operating button 37 when the latter is rotate
• the cutout 60 comprises a first track 60a of run shape according to which the spherical cap 54 of the button 37 can move, as a result of a rotation along its axis ZZ ', to come to occupy successively: its different "on" positions ", three in number in the example chosen, corresponding respectively to the three determined levels of motor speed, as well as its" stop “position, and a second range 60b communicating with the first range 60a and extending beyond this being located at the "stop" position of the button 37, so as to allow a significant angular stroke tilting of the cap 54 of the button 37, about its axis BB '( Figure 3), when the button occupies its "stop” position in which it controls the actuation of the election piece 47 of the whips.
• the cap 54 of the manual operating button 37 has at its base a lug 62 ( Figures 1 and 3), preferably molded with the cap 54, which directly actuates the election piece 47 whips when the spherical cap 54 of the button 37 in the "off" position is tilted forward around its axis BB '(as shown in phantom in Figure 3), using the joystick 55 which is moved in the cutout 60 ..figure 2) coming into abutment, at the end of tilting of the cap 54, against the front edge of the pad 60b of the cutout 60, the latter thus acting as the tilting guide - also.
• the ejection part 47 passes from its high position to its low position in which it releases, by its lower part 47a (FIG. 1), the whips 26; after ejection of the whips, the ejection part 47 is returned by its spring to its high position.
• the ejection of the whips advantageously requires from the user a voluntary action, moreover easy, on the button 37, and this in the same stop position of the button.
• the lug 62 for direct actuation of the ejection part 47 of the whips constitutes a particularly simple and inexpensive member.
• the fixed disc 49 of the rotary switch 40 comprises several fixed contacts formed by conductive tracks distnouées in the same arc of a circle, namely a so-called common track 64 and three tracks 65, 66 and 67 corresponding respectively, in the example chosen, at the three determined speeds of the motor 7, as well as an internal conductive track 68, concentric with the previous ones and corresponding to a high speed, called instantaneous speed, which is used, for example, for a mixer stand.
• the disc 49 is made of an insulating material in which are advantageously overmolded the conductive tracks 64-68, and comprises at its lower part a substantially parallelepipedal insulating strip 72, for example molded with the disc 49, extending in the housing 2 transversely to the shaft 51 and comprising on its front face an angular sector with several notches of mdexing 74 corresponding respectively to the "off" position and to the different "on" positions of the manual operation button.
• a slider 76 with flexible metal blades 77 carrying at the end two movable contacts 78, 79 which are intended respectively to come to cooperate with the track commune 64 and with one of the three tracks 65; 66; 67 according to the "on" position of the button 37.
• the movable contact blade intended to cooperate with the track 68 corresponding to the instantaneous running speed for a mixer stand has not been shown.
• the contacts 78 and 79 extend in the same vertical plane denoted P in FIG. 4.
• the disc 53 has at its lower part a rounded tongue 81 having a downward vertical tooth 83 engaged successively, as a result of the rotation of the disc 53, in the different locking notches 74 of the bar 72 according to the posi- 1 1
• the cap 54 of the manual operating button 37 is further capable of tilting about its axis BB 'in each of the "on" positions of the button, according to an angular travel markedly less than that making it possible to control the ejection of the whips, using the handle 55 which is moved in the cutout 60 ( Figure 2) coming into abutment, at the end of tilting of the cap 54, against the front edge of the range 60a of the cutout 60, the latter acting as tilting limiter.
• the cap 54 of the button 37 internally comprises a cam 85 which actuates, following the tilting of the cap 54 in each of the "on” positions of the button, a finger 87 which is movably mounted in the rotary disc 53 of switch 40
• the finger 87 has been represented diagrammatically in a rest position, defined before tilting of the cap 54 of the button 37 in each of its "on” positions, and in which it is in abutment on the metal blade 89 carrying at the end the mo- 12
• this same finger 87 is shown in a working position in which it is actuated by the cam 85 of the cap 54 of the button when this cap is tilted in each of the "on" positions of the button, and in which it bends the metal blade 89 so as to apply the movable contact 90 on the conductive track 92, thereby increasing the speed of the motor.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Food Science & Technology (AREA)
• Food-Manufacturing Devices (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9522111

Family Applications (1)

Country Status (9)

Cited By (1)

Families Citing this family (19)

Citations (3)

Family Cites Families (15)

• 1998
  • 1998-01-23 FR FR9800742A patent/FR2773978B1/fr not_active Expired - Lifetime
• 1999
  • 1999-01-22 US US09/600,900 patent/US6234663B1/en not_active Expired - Lifetime
  • 1999-01-22 DE DE69906932T patent/DE69906932T2/de not_active Expired - Lifetime
  • 1999-01-22 EP EP99903723A patent/EP1049398B1/de not_active Expired - Lifetime
  • 1999-01-22 BR BR9907198-3A patent/BR9907198A/pt not_active IP Right Cessation
  • 1999-01-22 RU RU2000122363/13A patent/RU2218857C2/ru active
  • 1999-01-22 WO PCT/FR1999/000140 patent/WO1999037195A1/fr active IP Right Grant
  • 1999-01-22 CN CN99804361.3A patent/CN1114379C/zh not_active Expired - Lifetime
  • 1999-01-22 ES ES99903723T patent/ES2196762T3/es not_active Expired - Lifetime

Patent Citations (3)

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